(1) Lehrbuch der technischen Physik (2) Die Theorie der Kräfteplne (3) Vibrations of Systems having One Degree of Freedom (4) Leerboek der Werktuigkunde

Abstract

THERE is probably no branch of science in which -L such wide gaps occur between theory and practice as in the study of the motion of fluids. We have, on one hand, the mathematical theory of hydrodynamics, which is limited by the difficulty of obtaining soluble problems and building up integrals of the differential equations of motion subject to given boundary conditions. This difficulty alone restricts the scope of the investigation mainly to the study of perfect fluids, thus immediately introducing a discrepancy between theory and observation. On the other hand, we have the hydraulics of the engineering student, the object of which is mainly to enable numerical calculations to be made regarding such problems as town water supply, efficiency of turbines, pumps, propellers, and ships.

(1) Lehrbuch der technischen Physik.

By Prof. Hans Lorenz. Dritter Band, Technische Hydromechanik. Pp. xxi + 500. (Munich and Berlin: R. Oldenbourg, 1910.) Price 14 marks.

(2) Die Theorie der Krfteplne.

By Prof. H. E. Timerding. Pp. iv + 100. (Leipzig and Berlin: B. G. Teubner, 1910.) Price 2.50 marks.

(3) Vibrations of Systems having One Degree of Freedom.

By Prof. B. Hopkinson. (Cambridge Engineering Tracts, No. 1.) Pp. 54. (Cambridge: University Press, 1910.) Price 2s. 6d. net.

(4) Leerboek der Werktuigkunde.

By F. J. Vaes. Vol. i., pp. xii + 152. Vol. ii., pp. xiv + 224. (Schiedam: H. A. M. Roelants, 1910.) Price 1.40 gulden.